979121520 has 400 divisors, whose sum is σ = 3743197920. Its totient is φ = 235726848.

The previous prime is 979121483. The next prime is 979121537. The reversal of 979121520 is 25121979.

979121520 is a `hidden beast` number, since 9 + 7 + 9 + 121 + 520 = 666.

979121520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×979121520² = 1917357901854220800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 4970062 + ... + 4970258.

Almost surely, 2^979121520 is an apocalyptic number.

979121520 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 979121520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1871598960).

979121520 is an abundant number, since it is smaller than the sum of its proper divisors (2764076400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

979121520 is a wasteful number, since it uses less digits than its factorization.

979121520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294 (or 279 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The square root of 979121520 is about 31290.9175320891. The cubic root of 979121520 is about 992.9915023780.

The spelling of 979121520 in words is "nine hundred seventy-nine million, one hundred twenty-one thousand, five hundred twenty".